ARM: Add instruction aliases for the Thumb2 PLD/PLDW (literal) alternate form.

See A8.8.127 in ARM DDI 0406C.b.

Related to <rdar://problem/14403733>.

llvm-svn: 186682

diff --git a/llvm/lib/Target/ARM/ARMInstrThumb2.td b/llvm/lib/Target/ARM/ARMInstrThumb2.td
index f014e02..fdbf5ae 100644 (file)
--- a/llvm/lib/Target/ARM/ARMInstrThumb2.td
+++ b/llvm/lib/Target/ARM/ARMInstrThumb2.td
@@ -4428,7 +4428,12 @@ def : t2InstAlias<"ldrsh${p}.w $Rt, $addr",
 def : t2InstAlias<"add${p} $Rd, pc, $imm",
                   (t2ADR rGPR:$Rd, imm0_4095:$imm, pred:$p)>;
 
-// PLI with alternate literal form.
+// PLD/PLDW/PLI with alternate literal form.
+def : t2InstAlias<"pld${p} $addr",
+                  (t2PLDpci t2ldr_pcrel_imm12:$addr, pred:$p)>;
+def : InstAlias<"pldw${p} $addr",
+                 (t2PLDWpci  t2ldr_pcrel_imm12:$addr, pred:$p)>,
+      Requires<[IsThumb2,HasV7,HasMP]>;
 def : InstAlias<"pli${p} $addr",
                  (t2PLIpci  t2ldr_pcrel_imm12:$addr, pred:$p)>,
       Requires<[IsThumb2,HasV7]>;

diff --git a/llvm/test/MC/ARM/basic-thumb2-instructions.s b/llvm/test/MC/ARM/basic-thumb2-instructions.s
index 50a505e..2bd9a13 100644 (file)
--- a/llvm/test/MC/ARM/basic-thumb2-instructions.s
+++ b/llvm/test/MC/ARM/basic-thumb2-instructions.s
@@ -1573,6 +1573,9 @@ _func:
 @ FIXME: pld   _foo                    @ encoding: [0x9f'A',0xf8'A',A,0xf0'A']
             @   fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
 
+        pld [pc,#-4095]
+@ CHECK: pld [pc, #-4095]            @ encoding: [0x1f,0xf8,0xff,0xff]
+
 
 @------------------------------------------------------------------------------
 @ PLD(register)

diff --git a/llvm/test/MC/ARM/thumb2-pldw.s b/llvm/test/MC/ARM/thumb2-pldw.s
new file mode 100644 (file)
index 0000000..7acbd39
--- /dev/null
+++ b/llvm/test/MC/ARM/thumb2-pldw.s
@@ -0,0 +1,7 @@
+@ RUN: llvm-mc -triple=thumbv7-apple-darwin -mcpu=cortex-a8 -mattr=+mp -show-encoding < %s | FileCheck %s
+
+@------------------------------------------------------------------------------
+@ PLD(literal)
+@------------------------------------------------------------------------------
+        pldw [pc,#-4095]
+@ CHECK: pldw [pc, #-4095]            @ encoding: [0x3f,0xf8,0xff,0xff]